<!--
 * @Author: yaojian66 1327629137@qq.com
 * @Date: 2022-07-05 17:30:06
 * @LastEditors: yaojian66 1327629137@qq.com
 * @LastEditTime: 2022-07-05 17:30:38
 * @FilePath: \geyao\第一百二十三题 计数.html
 * @Description: 这是默认设置,请设置`customMade`, 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>计数</title>
</head>
<body>
  <script>
    function count(arr, item) {
    let num = 0
    arr.forEach(el=>{
        if(el == item){
            num++
        }
    })
    return num;
}
  </script>
</body>
</html>